Concrete-chimney form.



C. P. WOODWORTH.

CONCRETE CHIMNE Y FORM.

APPLICATION FILED MAY 4, 1912.

Patented Jan. 8 1918.

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APPLICATION FILED MAY4.19I2.

Patented Jan. 8, 1918.

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C. P. WOODWORTH.

CONCRETE CHIMNEY FORM.

APPLICATION FILED MAY 4, l9i2- Patemd Jan. 8,1918.

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CONCRETE CHIMNEY FORM.' A'PPLICA'HON nuzo MAY 4.1912.

1,252,526. Patented Jan. 8,1918.

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CHARLES P. WOODWORTH, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WEBER CHIMNEY COMPANY, A CORPORATION OF ILLINOIS.

CONCRETE-CHIMNEY FORM.

Specification of Letters Patent.

Patented Jan. 8, 1918.

To all whom it may concern:

Be it known that I, CHARLES P. VVooD- woR'rH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Concrete- Chimney Forms, of which the following is a specification.

The principal object of my invention is to provide new and improved forms for building a tapering concrete chimney with a corresponding annular airspace in the wall thereof. Another object of my invention is to provide a tapering concrete chimney with a correspondingly tapered air space in its wall. Still another object of my invention is to provide forms for use in building a tapering aimular air space in the lower part of a concrete chimney. All these objects and various others will be made apparent in the following specification and claims taken with the accompanying drawings.

In these drawings I'have illustrated one specific embodiment of my invention and I will now proceed to describe the same.

Figure 1 is an elevation of a chimney built according to my invention.

Fig. 2 is a vertical section of the lower part of the same.

Fig. 3 is a top plan view of the chimney when partly built, showing the air space forms in place.

Fig. 4 is a fragmental horizontal section showlng the air space forms in some detail.

Fig. 5 is a vertical section showing the outside and inside forms and the air space forms.

Fig. 6 is a vertical section displaced a little relatively to that of Fig. 5, so as to show other elements of apparatus.

Fig. 7 is a perspective view of the air space form spreader.

Fig. 8 is a perspective view of the air space form joint plate.

Fig. 9 is a perspective view of the air space form wedge.

Fig. 10 is a perspective view of several of the air space forms partly broken away to show their construction.

A concrete foundation 15 is built in the ground and on this the outer wall 16 is erected extending continuously to the top of the chimney. Inside the chimney at its lower part is the inner wall 17 spaced from 65 the outer wall 16 so as to leave the annular air space 18. The opening 20 to admit smoke from the furnace into the chimney and the opening 21 to withdraw dust from the bottom of the chimney are provided as shown.

The outer and inner forms are designated respectively 25 and 26 in Figs. 5 and 6. These may be of the type shown in the Patent No. 968,905, granted August 30, 1910, to The Weber Chimney Company of Chicago, Illinois, a corporation of Illinois, as assignee of Carl Weber. The outside forms 25 and 25 may be moved up in alternation, the lowermost one being moved up past the other, and similarly for the inside forms 26 and 26. As is fully explained in the patent referred to, these outside and inside forms are so constructed as to be contracted by degrees as they are placed higher and higher, thereby giving the chimney its proper ta pering form.

The air space forms comprise outer panels 22 and inner panels 23. Each of these panels consists of vertical boards or staves attached to comparatively slender horizontal iron bars 24. The iron bars 24 are slightly flexible so that as the chimney ascends they can be bent slightly and thus increase the curvature of the panels 22 and 23 within the necessary limits. Through the upper parts of the panels 22 and 23 are registering holes in which the iron rods 27 may be passed to rest upon the top edges of the outside forms 25 and the inside forms 26, as shown in Figs. 5 and 6. Thus the air space form panels 22 and 23 are supported principally by being hung on the rods 27 which, in turn, are supported by the outside and inside forms 25 and 26.

Between the corresponding outside and inside form panels 22 and 23 are pairs of vertical spacing rods 28 with respective heads 29. The horizontal metal cleats 24 rest against these spacing rods 28 and the rods 28 are supported by their heads 29, resting upon the upper ends of the form panels 22 and 23.

Wedge blocks 30 are placed between consecutive pairs of form panels 22 and 23 at intermediate points and at their upper edges. These wedge blocks 30 have to be varied in size as the chimney ascends, being made smaller at greater heights. At some intermediate height it may be that one pair of panels 22 and 23 will be laid aside and larger wedge blocks 80 used to space the remaining panels apart.

No spacing means corresponding to, the blocks 30 are needed for the lower edges of the panels 22 and 23, because these project down into the previously formed air space 18, so that the outer and inner walls 16 and 17 hold the said lower edges of the air space form panels in proper position.

Over the wedge blocks 30 there is slipped a joint plate 31 bent in inverted U-shape, as shown in Fig. 8. This is made of sheet metal of suitable thickness and completes the air space forms, so that they shall have substantially continuous interior and exterior faces.

The concrete chimney walls having been built up to the stage represented in Fig. 5

' and the concrete having set sufficiently, the

spacing rods 28' are pulled up and out, for which purpose the heads 29 may be readily engaged by a suitable tool. With a crowbar or similar implement the operator then reaches down obliquely between the panels 22 and 23 and strikes the blocks 30 either breaking them up or turning them and thereby loosening the panels 22 and 23. The joint plates 31 and the panels 22 and 28 be- .ing loosened in this way can be readily removed. 1

Then the lower outside and inside forms 25 and 26 are carried up and placed above the forms that were previously above them; this is in accordance with the patent to Which I have made reference. After the outside and inside forms 25 and 26 in their new positions are properly secured in place, the air space forms are placed with their lower ends projecting down into the upper part of the completed air space 18 and their upper endssupported on the rods 27. The panels 22 and 23 are spaced apart properly by means of the rods 28 and the wedge blocks 30 and oint plates 31 are assembled in the proper relation. Next the concrete is poured into the spaces 011 either side of the air space forms, thus continuing the walls 16 and 17 up through the heightof the outside and inside forms. 7

Heretofore when it has been desired to build a coniform chimney with an air space, one way of proceeding has been to build it truly cylindrical up to the height of the inner wall and then make it coniform above that point. Another way has been to make the outside wall coniform for the entire height and the inside wall truly cylindrical for its height. Also, in order to get the air space in the lower part of the chimney, cy-

lindrical chimneys have been built with a reduced outside diameter above the heightof the inner wall.

By my invention there is produced a true coniform chimney from bottom to top with an inner wall and an intermediate air space,

all conforming in their taper to the taper chimney, outer and inner air space panels in pairs, and wedge blocks between the adjacent lateral edges of adjacent outer panels and adjacent inner panels, said wedge blocks adjacent the upper part of said panels being of smaller size than the lowermost wedge blocks and said panels being flexible whereby an inward tapering of the panels is effected to form a coniform air space.

5. In a device for forming a concrete chimney, outer and inner air space panels in pairs, and wedge blocks between the adj acent lateral edges of adjacent outer panels and adjacent V inner panels, said wedge blocks being of different size and said panels being flexible whereby gradual inward t'apering of the panels is efi'ected to form. a coniform air space, said wedge blocks being removable inwardly into said air space after the walls of the chimney have been formed around said panels.

6. In a device of the class described, outside forms, inside forms, outerand inner air. space p'anelsarranged in pairs, means for supporting said air space panels. on said-out side and inside forms, means to space apart' the air space panels of each pair, and removable spacing blocks between the upwardly extending edges of adjacent pairs of air space panels, said blocks'being located adjacent the upper and lower parts of saidpan els and being of different widths whereby said air space panels are inclined to form a coniform air space.

7. In a device of the class described, outside forms, inside forms, outer, and inner air space panels arranged in pairs, means for supporting said air space panels on said outside and inside forms, means'to space apart the air Space panels of each pair, removable spacing blocks between the upwardly extending edges of adjacent pairs of'air space panels, and sheet metal plates fitting oversaid blocks and closingthe spaces between adjacent inner air space panels and adja cent outer air space panels.

8. In a device of the class described, form panels placed side by side and spaced apart, wedge blocks to 0 between said form panels to maintain the same in spaced relation, and removable joint plates to embrace said wedge blocks and close the spaces between said form panels.

9. In a device of the class described, a plurality of form panels spaced apart, each form panel consisting of vertical staves attached to flexible transverse rods, removable wedge blocks between adjacent form panels, and inverted U-shaped plates to close, the spaces between adjacent form panels.

10. In a device of the class described, outside forms, inside forms, outer and inner air space forms arranged between said outside forms and said inside forms, each of said air space forms comprising a plurality of panels, means for supporting said air space panels on said outside and inside forms, means to space the outer air space forms from the inner air space forms, removable spacing blocks between the upwardly extending edges of adjacent air space panels, and plates to close the spaces between adjacent panels of the outer air space forms.

11. In a device 01": the class described, outside forms, inside forms, outer and inner air space forms arranged between said outside forms and said inside forms, each of said air space form's comprising a plurality of panels, means for supporting said air space panels on said outside and inside forms, means to space the outer air space form from the inner air space form's, removable spacing blocks between the upwardly extending edges of adjacent air space panels, and U-shaped plates to close the spaces between adjacent panels of the outer air space forms.

In testimony whereof, I have subscribed my name.

CHARLES P. WOODWORTH.

I/Vitnesses:

HENRY A. PARKS, F. A. FLORELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

